Utkarsh Saxena c22bb6f5b1 [clang] Implement lifetime analysis for lifetime_capture_by(X) (#115921) ...

This PR uses the existing lifetime analysis for the `capture_by`
attribute.

The analysis is behind `-Wdangling-capture` warning and is disabled by
default for now. Once it is found to be stable, it will be default
enabled.

Planned followup:
- add implicit inference of this attribute on STL container methods like
`std::vector::push_back`.
- (consider) warning if capturing `X` cannot capture anything. It should
be a reference, pointer or a view type.
- refactoring temporary visitors and other related handlers.
- start discussing `__global` vs `global` in the annotation in a
separate PR.

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Co-authored-by: Boaz Brickner <brickner@google.com>

2024-11-20 15:17:00 +01:00

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